The scene from the first film in which Rowley is fed up with Greg forcing him around and then dumps the guy. It’s true; Greg deserved it for not being more supportive than his friend, but he slowly gets shattered without Rowley around, and he begins to realize he’s the one who’s lost without Rowley.
In the sequel, Rodrick becomes very bitter toward Greg and ends their relationship when he finds them both caught for the celebration, which causes Rodrick to be barred from participating in the show. Then, Bill kicks Rodrick out of the band. The band which RODRICK started.